Ebyte Semtech SX1280 UART 3Km Range 2.4GHz 12dBm SMD 17.5*28.7mm CE FCC LoRa Wireless Transmitter RF Module
[IC]：SX1280
[Frequency]：2.4~2.5GHz
[Power]：12.5dBm
[Distance]：3.0km
[Interface]：UART
[Weight]：2.2±0.1g
[Introduction]：E28-2G4T12S is an UART module based on SEMTECH SX1280, it adopts transparent transmission and works at 2.4GHz band. It adopts LoRa, FLRC and GFSK modulations. It features SMD packing with both IPX and PCB antenna interfaces, and its TTL output is 3.3V.
| Pin No. | Pin Item | Pin Direction | Pin Application |
|---|---|---|---|
| 1 | GND | Ground | Ground |
| 2 | NC | - | Disconnected |
| 3 | M0 | Input | M2, M1 and M0 jointly decide the 8 operation modes.(cannot be floated, can be grounded if not used) |
| 4 | M1 | Input | M2, M1 and M0 jointly decide the 8 operation modes.(cannot be floated, can be grounded if not used) |
| 5 | M2 | Input | M2, M1 and M0 jointly decide the 8 operation modes.(cannot be floated, can be grounded if not used) |
| 6 | RXD | Input | TTL serial input, connected to external TXD output pin. Can be configured as open-drain or pull-up input, please refer to parameter configuration. |
| 7 | TXD | Output | TTL serial output, connected to external RXD input pin Can be configured open-drain or push-pull output, please refer to parameter configuration. |
| 8 | AUX | Output | Used to indicate the module operation status, when user wakes up the external MCU,it outputs low level during initialization after power on and self-check, can be configured as open-drain output or push-pull output, please refer to parameter configuration. (can be floated) |
| 9 | VCC | - | Module power source positive reference.Voltage range: 2.3 ~ 5.5V DC |
| 10~11 | GND | Ground | Ground |
| 12~19 | NC | - | Disconnected |
| 20 | GND | Ground | Ground |